Mach to Feet per Second
( M → ft/s )
Instantly convert Mach (speed of sound ratio) to feet per second. Enter any value below and get an accurate result with the full formula and reference table.
How to Convert Mach to Feet per Second
To convert Mach to feet per second, multiply the number of Mach by 1116.437. This is the speed of sound at sea level in dry air at 20°C.
Step-by-Step Example
Let’s convert Mach 2 to feet per second:
1. Multiply by 1116.437: 2 × 1116.437 = 2232.874
2. So Mach 2 equals 2232.874 ft/s.
For a smaller amount, Mach 0.5 × 1116.437 = 558.2185 ft/s.
Speed Regimes & Mach Numbers
Mach numbers describe different flight regimes :
- Subsonic: Below Mach 0.8 (most general aviation)
- Transonic: Mach 0.8–1.2 (commercial jets cruise here)
- Supersonic: Mach 1.2–5.0 (military jets, Concorde)
- Hypersonic: Above Mach 5.0 (space vehicles)
When You’d Use Each Unit
Mach numbers are used in aviation and aerospace to express speed relative to the speed of sound, which varies with altitude and temperature. Feet per second are often used in engineering, ballistics, and some everyday applications in the United States. Converting between them is essential for aeronautical engineering, flight planning, and understanding aircraft performance.
Common Mach values converted to feet per second — typical values highlighted.
| Mach | ft/s | Approximate |
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